Abstract: An acoustic telemetry unit comprising an acoustic receiver for receiving acoustic telemetry signals is disclosed. The acoustic telemetry unit comprises a filter for filtering signals received by the acoustic receiver, a processor for processing signals passed by the filter to recover a data signal, the processor being operable in a sleep mode, and means for waking the processor from the sleep mode in dependence on an output of the filter. An energy storage module may be charged using signals received by the acoustic receiver which are not passed by the filter. The disclosed techniques may help to conserve battery power.

Abstract: An acoustic telemetry unit comprising an acoustic receiver for receiving acoustic telemetry signals is disclosed. The acoustic telemetry unit comprises a filter for filtering signals received by the acoustic receiver, a processor for processing signals passed by the filter to recover a data signal, the processor being operable in a sleep mode, and means for waking the processor from the sleep mode in dependence on an output of the filter. An energy storage module may be charged using signals received by the acoustic receiver which are not passed by the filter. The disclosed techniques may help to conserve battery power.

Abstract: A setting tool is disclosed for setting an acoustic telemetry unit in tubing, such as wellbore tubing. The setting tool comprises an anchor motor for driving an expandable anchor, a control unit for controlling the anchor motor, and an acoustic receiver. The control unit is arranged to determine whether an acoustic signal is successfully received by the acoustic receiver and to control the anchor motor in dependence thereon. By providing the setting tool with the acoustic receiver and determining whether an acoustic signal is successfully received by the acoustic receiver, it can be judged whether an acoustic signal from another acoustic telemetry unit in the tubing can be successfully received by the acoustic telemetry unit which is being set. This may facilitate deployment of a repeater unit at an optimum distance from another acoustic telemeter unit which is already in the tubing.

Abstract: An acoustic telemetry unit comprising an acoustic receiver for receiving acoustic telemetry signals is disclosed. The acoustic telemetry unit comprises a filter for filtering signals received by the acoustic receiver, a processor for processing signals passed by the filter to recover a data signal, the processor being operable in a sleep mode, and means for waking the processor from the sleep mode in dependence on an output of the filter. An energy storage module may be charged using signals received by the acoustic receiver which are not passed by the filter. The disclosed techniques may help to conserve battery power.

Abstract: A setting tool is disclosed for setting an acoustic telemetry unit in tubing such as wellbore tubing. The setting tool comprises an anchor motor for driving an expandable anchor, a control unit for controlling the anchor motor, and an acoustic receiver. The control unit is arranged to determine whether an acoustic signal is successfully received by the acoustic receiver and to control the anchor motor in dependence thereon. By providing the setting tool with the acoustic receiver and determining whether an acoustic signal is successfully received by the acoustic receiver, it can be judged whether an acoustic signal from another acoustic telemetry unit in the tubing can be successfully received by the acoustic telemetry unit which is being set. This may facilitate deployment of a repeater unit at an optimum distance from another acoustic telemeter unit which is already in the tubing.